Locking device for impulse-starters.



F. W. ANDREW. LOCKING DEVICE FOR IMPULSE STARTERS.

APPLICATION FILED'JUNE 29. $918.

Patented 0612.15, 1918.

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LOCKING DEVICE FOR IMPULSE STARTERS.

APPLICATION FILED JUNE 29. I918- Patented 0015.15, 1918 2 SHEET$SHEET 2 avwamtoz pa" an air on on FREDERICK WILLIAM ANDREW, 0F BROOKLYN, NEW YORK, ASSIGNORFIO EISEMANN MAGNETO C(f, OF BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

LOCKING DEVICE FOR IMPULSE-STARTERS.

Specification of Letters Patent.

Patented Cct.15,1918.

Application filed June 29, 1918. Serial No. 242,613.

To all whom it may concern:

Be it known that I, FREDERICK WILLIADI ANDREW, a citizen of the United States, and a resident of the city of New York, borough of Brooklyn, county of Kings, and State of New York, have invented certain new and useful Im rovements in Looking Devices for Impulsetarters, whereof the following 1s a full, clear, and exact specification.

My invention relates to devices known in mounted thereon, and of a spring, which is tensioned by rotating the driving part in advance of the driven part, and then, reacting, propels the latter rapidly through a part of its revolution, approximately equal to the advance of the driving part. They are designed to operate as a coupling after the engine been started, the driven and the driving parts of the device being usually connected by the aforementioned spring. The

' functioning of these devices depends upon the activity of the spring, constituting in some instances, the only connection between the driven and the driving parts. Consequently, the breaking of. the spring renders the impulse starter inoperative, not only for the starting of the engine, but also as means for transmitting rotatory motion from the driving shaft to the shaft of the rotatory part .of the magneto, and the magneto, and the ignition,'and consequently also the engine, are thereby put out of action.

The object of my invention is to provide means for locking together the driving and the driven parts of the starting devices, these means to be inactive when the start ing device is in operative condition, but ready to be employed when the actuating spring breaks, or is so weakened as to cause serious lag in the ignition, or whenever the starting device is rendered inoperative from other causes.

The forms of construction of the locking means are largely determined by the con-' structions of the starting devices, upon which they are to be used; the forms, illusv trated in the accompanying drawings, and

hereinafter described, show the principal features of all locking means, constructed according to my invention, and the method of their applications to the starting devices.

In the accompanying drawings Figure 1 is a topview, and

Fig. 2 is a front view of a impulse starter, with a locking device constructed, and applied thereto, according to my invention, part of the driven member of the impulse starter being brokenoff in Fig.1 to show the parts of the locking device engaged therewith when in operative position; the inactive position of the locking device being shown in dotted lines in Fig. 1;

Fig. 3 is a plan view of the locking device, and p Fig. 4 a sectional view on line 4+4 indicated in Fig. 3;

Fig. 5 is a top view, and

Fig. 6 a front view, of another form of impulse starter, showing my improved looking device applied thereto, the locking device being shown in its inactive position;

Fig.7 is a plan View of the locking de-' .Vice', used on the impulse starter shown in -Figs.-5 and 6, and

Fig. 8 a sectional view thereof on line 88 indicated in Fig. 7; and

Fig; 9 is a side view of the impulse starter shown" in Figs. 5 and 6 with the locking device in actingposition.

The construction of the locking device is conditioned by the construction of the impulse starter, to which it is to be applied,

for locking together of the driven with the driving part of the impulse starter, ie. for locking the parts securely together, when the spring breaks, orthe starting device is rendered inoperative from any other cause.

As shown inthe drawings, the locking device, designated hlkin F igs 1 to 4, is made in the form of a for ed bolt, and is secured by the set screw 12 to the driving part 13 of the impulse starter, illustrated in Figs. 1 and 2.

The locking devicell may be stamped in the form shown in Fig. 3, of'sheet metal, a

hole 12 punched therein, and then curved correspondingly to the circumference of the part of the impulse starter to which it is to be secured. The hole 12 is punched as shown.

.in' Figs. 3 and 4:, to fit the screw 12' and to yond, and near to, one of the cams 16, and i the bores in the driven part 14 beyond, and

near to one of the recesses 17. In this position the locking device when in its inactive position, shown in dotted lines in Figs. 1 and 2, does not interfere with the operating of the impulse starter in any way, and when it becomes necessary to use it, it can be readily set into its position shown in full lines in Figs. -1 and 2, by turning the bolt 11 and setting its prongs 11 into the bores 18 in thedriving part, whereby the driven and the driving parts are locked together in the same relative position as they would be held by the springunder normal conditions.-

The selection of the point where the locking device is to be applied to the impulse starter, illustrated in Figs. 5, 6 and 9, pre sents less difiiculty for decision, the greater width of the driving part 13 affording ample space for the locking device to be mounted thereon, so as not to interfere in any way with any of the operating parts of the ln other respects the impulse starter. The circumstance, however, that the driven and the driving parts of this impulse starter are of the same size, requires the form of the locking det ice to be modified, as shown in Figs. 7 and 8, by bending the prongs 11 at an approximately right angle, and to make the bores 18 in the peripheral surface of the driven part .14.

operative and inoperative positions, of this locking is the sameas that described above. A screw-threaded bore, into which the set screw 12 is fitted, is made in the driving part 13, preferably some distance beyond the cam 19. The inactive position of the' locking .device is shown in Figs. 5 and 6. The two bores 18 inthe driven part 14 are located beyond and near the slot 21, in which the trip lever of the pawl of the interior mechanism of the impulse starter operates. This position is selected for the reason that if the driven and the driving parts arev "up the driving strain and construction, and the the two parts,

locked together in this relation to each other, the tooth on the interior hub of the driv ing part, wherewith the' above-mentioned pawl engages, face of the cam on the hub of the drivenmember, which limits the extent of the rotary motion of the driven part, and, consequently, takes relieves to that extent the locking device, whose functionthenis confinedto the maintaining of the driven and the driving parts in that position.

These examples of constructing and using the locking device have been selected to show the varying conditions, which must be met, and also the way of meeting them by correspondingly modifying the details of the locking device and of its application to impulse starters difi'ering in details of their construction.

I claim as my invention:

1. The combination with an impulse starting device, comprising a driven part, adapted to be fixed on the'rotatory partof a magneto, a driving part rotatably mounted thereon, and a spring, yieldingly connecting them, of manually operatable means, movably secured to one part, and adapted to be set in engagement with the other part, for locking together the driving and the driven parts of the impulse starter; substantially as herein shown and described.

2. The combination with an impulse starting device, comprising a driven part, adapted tobe fixed on the rotatory part of a magneto, a driving part rotatably mountedthereon, and a' spring, yieldingly connecting them, of a locking device comprising a recess in one part, and a bolt, turn-ably secured to the other part, the bolt being fitted into the recess, and when turned and set therein locking together the driving and the driven part'of the impulse starter; substantially as herein shown and described.

3. A coupling device, comprising a driven part, a driving part rotatably' mounted on the driven part, and manually operatable coupling means movably secured to one of means on the other part adapted to engage with the' coupling means, and means for fixing the coupling means in active, or inactive, position; substantially as herein shown and described.

FREDERICK WILLIAM ANDREW.

Witnesses:

CHARLES S. Sxmmm, Lou se KELLER.

is then in contact with the- 

